Fix: Pin Rubocop version to 2.0.0+

Gemfile

@@ -26,7 +26,8 @@ group :test do
   gem 'puppet-blacksmith',                                          :require => false, :git => 'https://github.com/voxpupuli/puppet-blacksmith.git'
   gem 'voxpupuli-release',                                          :require => false, :git => 'https://github.com/voxpupuli/voxpupuli-release-gem.git'
   gem 'puppet-strings',                                             :require => false, :git => 'https://github.com/puppetlabs/puppetlabs-strings.git'
-  gem 'rubocop-rspec', '~> 1.5',                                    :require => false
+  gem 'json_pure', '<= 2.0.1',                                      :require => false if RUBY_VERSION < '2.0.0'
+  gem 'rubocop-rspec', '~> 1.5',                                    :require => false if RUBY_VERSION >= '2.0.0'
 end
 
 group :development do

Rakefile

@@ -1,12 +1,15 @@
 require 'puppetlabs_spec_helper/rake_tasks'
 require 'puppet_blacksmith/rake_tasks'
 require 'voxpupuli/release/rake_tasks'
-require 'rubocop/rake_task'
 require 'puppet-strings/rake_tasks'
 
-RuboCop::RakeTask.new(:rubocop) do |task|
-  # These make the rubocop experience maybe slightly less terrible
-  task.options = ['-D', '-S', '-E']
+if RUBY_VERSION >= '2.0.0'
+  require 'rubocop/rake_task'
+
+  RuboCop::RakeTask.new(:rubocop) do |task|
+    # These make the rubocop experience maybe slightly less terrible
+    task.options = ['-D', '-S', '-E']
+  end
 end
 
 PuppetLint.configuration.log_format = '%{path}:%{linenumber}:%{check}:%{KIND}:%{message}'